Run the installer and select the Express option. Note the directory where you installed the CUDA toolkit. In this guide, we installed in the directory `C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v9.1`
<palign="center">
<imgsrc="images/install_nvidia_cuda_toolkit.PNG"
alt="install nvidia cuda toolkit"
width="500" border="10" />
</p>
## Step 2: Install Nvidia cuDNN library
<ahref="https://developer.nvidia.com/cudnn"target="_blank">Download</a> and install the cuDNN library from Nvidia. cuDNN is is a GPU-accelerated library of primitives for deep neural networks. Before you can download, you will need to sign up for free to the Nvidia Developer Program.
Once you've signed up, go back to the cuDNN <ahref="https://developer.nvidia.com/cudnn"target="_blank">downloads page</a>. You may or may not be asked to fill out a short survey. When you get to the list cuDNN releases, __make sure you are downloading the right version for the CUDA toolkit you installed in Step 1.__ In this guide, we are using version 7.1.1 for CUDA toolkit version 9.1+ ([direct link](https://developer.nvidia.com/compute/machine-learning/cudnn/secure/v7.1.1/prod/9.1_20180214/cudnn-9.1-windows10-x64-v7.1)).
After you have downloaded the cuDNN files, you will need to extract the files into the CUDA toolkit directory. In the cuDNN zip file, there are three folders called `bin`, `include`, and `lib`. Copy these three folders into the CUDA toolkit directory. In this guide, the CUDA toolkit directory is located at `C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v9.1`
After you have downloaded the cuDNN files, you will need to extract the files into the CUDA toolkit directory. In the cuDNN zip file, there are three folders called `bin`, `include`, and `lib`.
<palign="center">
<imgsrc="images/cudnn_zip_files.PNG"
alt="cuDNN zip files"
width="500" border="10" />
</p>
Copy these three folders into the CUDA toolkit directory. In this guide, the CUDA toolkit directory is located at `C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v9.1`
<palign="center">
<imgsrc="images/cuda_toolkit_directory.PNG"
alt="cuda toolkit directory"
width="500" border="10" />
</p>
## Step 4: Set Environment Variables
## Step 3: Set Environment Variables
To set the environment variable, type `environment variables` in the search bar (this can be reached by hitting the Windows key or the bottom left Windows button). You should see an option called __Edit the system environment variables__. From here, click the __Environment Variables__ button. Click __New__ to add a new system variable _(make sure you do this under __System variables__ and not User variables_. For __Variable Name__, enter `CUDA_HOME`. For the variable value, put the directory location for the CUDA toolkit. In this guide, the directory location is `C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v9.1`. Press __OK__ once.
To set the environment variable, type `environment variables` in the search bar (this can be reached by hitting the Windows key or the bottom left Windows button). You should see an option called __Edit the system environment variables__.
<palign="center">
<imgsrc="images/edit_env_var.png"
alt="edit env variables"
width="250" border="10" />
</p>
From here, click the __Environment Variables__ button. Click __New__ to add a new system variable _(make sure you do this under __System variables__ and not User variables_.
<palign="center">
<imgsrc="images/new_system_variable.PNG"
alt="new system variable"
width="500" border="10" />
</p>
For __Variable Name__, enter `CUDA_HOME`. For the variable value, put the directory location for the CUDA toolkit. In this guide, the directory location is `C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v9.1`. Press __OK__ once.
<palign="center">
<imgsrc="images/system_variable_name_value.PNG"
alt="system variable names and values"
width="500" border="10" />
</p>
To set the two path variables, inside the same __Enviornment Variables__ window and under the second box called __System Variables__, find a variable called `PATH` and click __Edit__. You will add two directories to the list. For this guide, the two entries would look like:
Make sure to replace the relevant directory location with the one you have installed. _Please note that case sensitivity matters_.
<palign="center">
<imgsrc="images/path_variables.PNG"
alt="Path variables"
width="500" border="10" />
</p>
<palign="center">
<imgsrc="images/anaconda_install.PNG"
alt="Anaconda Install"
width="500" border="10" />
</p>
<palign="center">
<imgsrc="images/anaconda_default.PNG"
alt="Anaconda Install"
width="500" border="10" />
</p>
After installation, you will need to open __Anaconda Navigator__ to finish. From the Windows search bar, type _anaconda navigator_. You can close Anaconda Navigator after it opens.
## Step 5: Setup and Activate a New Conda Environment
conda create -n ml-agents python=3.6
You may be asked to install NEW packages. Type `y` and press enter _(make sure you are connected to the internet)_. You will need these new packages. This will create a new Conda environment called ml-agents using Python version 3.6. To use this environment, you will need to activate it. _(In the future, if you need to use this environment again, you can run the same command)_. In the same Anaconda Prompt, type in the following command:
You may be asked to install NEW packages. Type `y` and press enter _(make sure you are connected to the internet)_. You will need these new packages. This will create a new Conda environment called ml-agents using Python version 3.6.
<palign="center">
<imgsrc="images/conda_new.PNG"
alt="Anaconda Install"
width="500" border="10" />
</p>
To use this environment, you will need to activate it. _(In the future, if you need to use this environment again, you can run the same command)_. In the same Anaconda Prompt, type in the following command:
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